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A charge -1 C is stuck at x=0. A charge +4 C is stuck at x=2 m. You need to place a positive charge Q somewhere along the x-axis so that it doesn't move. No glue, staples, nails etc. are available.
It should be placed at:
a) x = 2/3 m
b) x = -1 m
c) x = -2 m
d) x = 5 m
e) x = -1/2 m |